Finally! Just hacked the backslash glyph too.. If only I had more time right now to look at that editor!

It sounds like you are on a reasonable path that has a good chance of success.

I had a bit of spare time.. I tried a few things but ultimately I replaced the Fake6502 with the Fake65 C 02 version from C65 and here's the result:

TaliWorks1.png

(It works!)

The first keypress checking program ...

To help with your screen editor approach, you have several options.
Your options include (but are not limited to):
A: Modify ACCEPT to use your screen editor and copy the line where ENTER was pressed into the given buffer location (will have to handle the case where the line has more characters ...

Can you verify that the Forth code you are trying to compile works in either c65 or py65mon? If so, that would point to an issue with your simulator. I will double-check today and verify the version you are using works on real hardware.

Yes, it definitely works fine with C65 and that's using the ...

8D81 where underflow_1 is called at the beginning of PARSE - the underflow-1 routine makes sure there is at least 1 item on the stack.
..
The underflow_1 routine will complain and give a stack trace when the value in the X register (which holds the Forth data stack pointer) indicates there is less ...

The last one is you, but it's a simple fix - you just need to put the 42 on the stack before calling EMIT.

That doesn't surprise me. I thought I'd copied directly from my Starting Forth book but it was at the end of the day. Thanks for that one :)


The underflow_1 routine will complain and give ...

The manual is in the middle of getting some updates for changes made recently, so you may want to hold off on the spiral bound version, but thanks for the compliment. Scot Stevenson, the original author, was big on documentation and put a lot of effort into the manual. I try to keep it up to date ...

That looks great. The default behavior of BYE is to run a BRK instruction, and the default ISR vector for BRK instructions (or any interrupts, really) is kernel_init, so the fact it starts over again is expected behavior. You can write a new kernel_bye if you have an OS or monitor you would like to ...

The listing for taliforth-py65mon will end up in the file docs/py65mon-listing.txt and there is a labelmap there too if that's helpful.


Well I seem to be getting somewhere.. My "screen" was actually an editor similar to the C64 but I've been changing it to do the simple PUTCH/GETCH behaviour. My ...

There are no BRK instructions in Tali itself

My disassembler text was wrong. Instead of looking up opcode names at the PC, it was just using a bogus pointer. Now I have the code executing from $8000. I can see the CLD followed by the LDA/STA pair that store the address of kernel_putc. Because I'm ...

There are no BRK instructions in Tali itself except for one in the word BYE, but I believe the unused areas in the bin file are zero filled so those will show up as BRK if you accidentally try to run code there. That reminds me - I believe you end up in a series of BRK instructions if the CPU is a ...

If you need any help, there's a Tali-specific thread here you can ask questions in:
http://forum.6502.org/viewtopic.php?f=9&t=2926
..
What Windows app do you use for simulation?

I installed MinGW and build the C65 version to try it out over the weekend (I admit I have been busy with other ...

If your homebrew system has a 65 C 02 in it, I'll also put in a shameless plug for Tali Forth 2:
https://github.com/SamCoVT/TaliForth2
It's a significantly faster forth than FIG and is generally easy to port to new hardware (see the manual in the docs folder). It does require a 65C02 (won't run ...

Once you get your word (written in Forth) working, then you can add it to the assembly source. You'll need to learn how to access the Forth data stack from assembly, and you'll need to add your word to the vocabulary linked list. When you get that far, let us know and we can help.

Yeah that's ...

After watching some Youtube videos on C64 White Lightning.. I have a new itch..

I have a virtual 6502 machine that I've played around with on Windows. I've made a simple Vic 20 emulator, BBC BASIC emulator and other things.. Now I'm thinking about building a copy of fig-Forth and creating some ...